[chore] update code style and add some comment (apache#1975)

Signed-off-by: yuluo-yx <[email protected]>
Co-authored-by: 东风 <[email protected]>

Author: YuLuo

common/src/main/java/org/apache/hertzbeat/common/cache/CacheFactory.java

@@ -22,7 +22,7 @@
 /**
  * common cache factory
  */
-public class CacheFactory {
+public final class CacheFactory {
     private CacheFactory() {}
 
     private static final CommonCacheService<String, Object> NOTICE_CACHE =

common/src/main/java/org/apache/hertzbeat/common/cache/CaffeineCacheServiceImpl.java

@@ -21,7 +21,6 @@
 import com.github.benmanes.caffeine.cache.Caffeine;
 import java.time.Duration;
 
-
 /**
  * caffeine cache impl
  */

common/src/main/java/org/apache/hertzbeat/common/constants/CommonConstants.java

@@ -353,8 +353,7 @@ public interface CommonConstants {
      * status page component calculate method manual
      */
     byte STATUS_PAGE_CALCULATE_METHOD_MANUAL = 1;
-    
-    
+
     /**
      * status page incident state investigating
      */

common/src/main/java/org/apache/hertzbeat/common/constants/SignConstants.java

@@ -26,7 +26,6 @@ public interface SignConstants {
 
     String WELL_NO = "#";
 
-
     String LINE_FEED = "\n";
 
     String CARRIAGE_RETURN = "\r";

common/src/main/java/org/apache/hertzbeat/common/entity/alerter/Alert.java

@@ -45,7 +45,6 @@
 import org.springframework.data.annotation.LastModifiedDate;
 import org.springframework.data.jpa.domain.support.AuditingEntityListener;
 
-
 /**
  * Alarm record entity
  */

common/src/main/java/org/apache/hertzbeat/common/entity/alerter/AlertConverge.java

@@ -46,7 +46,6 @@
 import org.springframework.data.annotation.LastModifiedDate;
 import org.springframework.data.jpa.domain.support.AuditingEntityListener;
 
-
 /**
  * Alert Converge strategy entity
  */

common/src/main/java/org/apache/hertzbeat/common/entity/alerter/AlertDefine.java

@@ -47,9 +47,6 @@
 import org.springframework.data.annotation.LastModifiedDate;
 import org.springframework.data.jpa.domain.support.AuditingEntityListener;
 
-
-
-
 /**
  * Alarm Define Rule Entity
  */

common/src/main/java/org/apache/hertzbeat/common/entity/alerter/AlertDefineMonitorBind.java

@@ -43,8 +43,6 @@
 import org.springframework.data.annotation.LastModifiedDate;
 import org.springframework.data.jpa.domain.support.AuditingEntityListener;
 
-
-
 /**
  * Alarm Threshold Relate Monitor Entity
  */

common/src/main/java/org/apache/hertzbeat/common/entity/alerter/AlertSilence.java

@@ -47,8 +47,6 @@
 import org.springframework.data.annotation.LastModifiedDate;
 import org.springframework.data.jpa.domain.support.AuditingEntityListener;
 
-
-
 /**
  * Alert Silence strategy entity
  */

common/src/main/java/org/apache/hertzbeat/common/entity/alerter/JsonMapAttributeConverter.java

@@ -17,8 +17,6 @@
 
 package org.apache.hertzbeat.common.entity.alerter;
 
-
-
 import com.fasterxml.jackson.core.type.TypeReference;
 import jakarta.persistence.AttributeConverter;
 import jakarta.persistence.Converter;